Never had a single problem with my foldable tires, both Michelin and Continental. I had 1 wire bead Schwinn tire blow off the rim (A 27X1-1/4 Puff) in 1972. I had inflated it to the specified Maximum inflation of 100 P.S.I. and was riding away when it let go. The asphalt tore a chunk out of the tire's sidewall so it was scrap then. Never had any other problems other than the odd flat from road debris including trouble free time on tubulars.